class_docstr: Class for the Hitting Set Algorithm to obtain a approximate minimal set of backdoor variables
  to condition on for each node pair.
docstr: Obtain indices covered in a particular iteration of the algorithm.
docstr_tok: ["Obtain","indices","covered","in","a","particular","iteration","of","the","algorithm","."]
code: def _indices_covered(self, el, set_index=None):
      """
      Obtain indices covered in a particular iteration of the algorithm.
      """
      covered = set()
      if set_index == None:
          set_index = set([i for i in range(len(self._list_of_sets))])
  
      for idx in set_index:
          if el in self._list_of_sets[idx]:
              covered.add(idx)
      return covered
  
imports: import networkx
  from dowhy.utils.graph_operations import adjacency_matrix_to_adjacency_list
label_desc: Use image node_id 7 for calling the HittingSetAlgorithm obj's underlying member method code with example usage: obj._indices_covered(el, set_index) and returns: covered